EP 0408606 B1 19930901 - FLUID CATALYTIC CRACKING (FCC) CATALYST AND ADDITIVE LOADING AND CONTROL SYSTEM
Title (en)
FLUID CATALYTIC CRACKING (FCC) CATALYST AND ADDITIVE LOADING AND CONTROL SYSTEM
Publication
Application
Priority
US 15616288 A 19880216
Abstract (en)
[origin: WO8907487A1] The disclosed method and apparatus provides for providing piecewise continuous addition of microspheroidal (''MS'') Fluid Catalytic Cracking (''FCC'') catalyst additives and/or bulk catalyst via hopper (15) and gate valve (13) to an in situ circulating, active catalyst inventory (7) of a fluid catalytic cracking unit at programmed rates precisely controlled to sustain effective additive concentration while damping excessive performance fluctuations. In a preferred version of this invention, each of a series of such apparatus comprising one such device for each catalyst additive, is operated on a basic cycle time length during a portion of which the unit is engaged in active addition while in the remainder of the time it is passive, and wherein the timing being under the primary control of a process variable feedback signal. An overriding secondary control, imposed by a fundamental performance criterion, may also be employed.
IPC 1-7
IPC 8 full level
B01J 8/24 (2006.01); B01J 8/00 (2006.01); C10G 11/18 (2006.01)
CPC (source: EP)
B01J 8/0035 (2013.01); C10G 11/187 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 8907487 A1 19890824; CA 1331159 C 19940802; DE 68908883 D1 19931007; DE 68908883 T2 19940120; EP 0408606 A1 19910123; EP 0408606 A4 19910130; EP 0408606 B1 19930901; JP H03501358 A 19910328; JP H0732869 B2 19950412
DOCDB simple family (application)
US 8900601 W 19890213; CA 591031 A 19890214; DE 68908883 T 19890213; EP 89903424 A 19890213; JP 50308389 A 19890213